busybox.sgml

手机嵌入式Linux下可用的busybox源码

		<para>
		<screen>
			$ mknod /dev/fd0 b 2 0 
			$ mknod -m 644 /tmp/pipe p
		</screen>
		</para>
	</sect1>

	<sect1 id="mkswap">
	    <title>mkswap</title>

		<para>
		Usage: mkswap [OPTION]... DEVICE [BLOCKS]
		</para>

		<para>
		Prepare a disk partition to be used as a swap partition.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-c	Check for read-ability.
			-v0	Make version 0 swap [max 128 Megs].
			-v1	Make version 1 swap [big!] (default for kernels &gt; 2.1.117).
			BLOCKS	Number of block to use (default is entire partition).
		</screen>
		</para>
	</sect1>

	<sect1 id="mktemp">
	    <title>mktemp</title>

		<para>
		Usage: mktemp TEMPLATE
		</para>

		<para>
		Creates a temporary file with its name based on
		TEMPLATE.  TEMPLATE is any name with six `Xs' (i.e.,
		/tmp/temp.XXXXXX).
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ mktemp /tmp/temp.XXXXXX
			/tmp/temp.mWiLjM
			$ ls -la /tmp/temp.mWiLjM
			-rw-------    1 andersen andersen        0 Apr 25 17:10 /tmp/temp.mWiLjM
		</screen>
		</para>
	</sect1>

	<sect1 id="more">
	    <title>more</title>

		<para>
		Usage: more [FILE]...
		</para>

		<para>
		Page through text one screenful at a time.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ dmesg | more
		</screen>
		</para>
	</sect1>

	<sect1 id="mount">
	    <title>mount</title>

		<para>
		Usage: mount [OPTION]...
		</para>

		<para>
		<screen>
		   or: mount [OPTION]... DEVICE DIRECTORY
		</screen>
		</para>

		<para>
		Mount filesystems.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-a	Mount all filesystems in /etc/fstab
			-o	One of the many filesystem options listed below
			-r	Mount the filesystem read-only
			-t TYPE	Specify the filesystem type
			-w	Mount the filesystem read-write
		</screen>
		</para>

		<para>
		Options for use with the -o flag:
		</para>

		<para>
		<screen>
			async/sync	Writes are asynchronous / synchronous
			atime/noatime	Enable / disable updates to inode access times
			dev/nodev	Allow / disallow use of special device files
			exec/noexec	Allow / disallow use of executable files
			loop		Mount a file via loop device
			suid/nosuid	Allow / disallow set-user-id-root programs
			remount		Remount a currently mounted filesystem
			ro/rw		Mount filesystem read-only / read-write
		</screen>
		</para>

		<para>
		There are even more flags that are filesystem specific.
		You'll have to see the written documentation for those.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ mount
			/dev/hda3 on / type minix (rw)
			proc on /proc type proc (rw)
			devpts on /dev/pts type devpts (rw)
			$ mount /dev/fd0 /mnt -t msdos -o ro
			$ mount /tmp/diskimage /opt -t ext2 -o loop
		</screen>
		</para>
	</sect1>

	<sect1 id="mt">
	    <title>mt</title>

		<para>
		Usage: mt [OPTION] OPCODE VALUE
		</para>

		<para>
		Control magnetic tape drive operation.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-f DEVICE	Control DEVICE
		</screen>
		</para>
	</sect1>

	<sect1 id="mv">
	    <title>mv</title>

		<para>
		Usage: mv SOURCE DEST
		</para>

		<para>
		<screen>
		   or: mv SOURCE... DIRECTORY
		</screen>
		</para>

		<para>
		Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ mv /tmp/foo /bin/bar
		</screen>
		</para>
	</sect1>

	<sect1 id="nc">
	    <title>nc</title>

		<para>
		Usage: nc HOST PORT
		</para>

		<para>
		   or: nc -p PORT -l
		</para>


		<para>
		Open a pipe to HOST:PORT or listen for a connection on PORT.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ nc foobar.somedomain.com 25
			220 foobar ESMTP Exim 3.12 #1 Sat, 15 Apr 2000 00:03:02 -0600
			help
			214-Commands supported:
			214-    HELO EHLO MAIL RCPT DATA AUTH
			214     NOOP QUIT RSET HELP
			quit
			221 foobar closing connection
		</screen>
		</para>
	</sect1>

	<sect1 id="nslookup">
	    <title>nslookup</title>

		<para>
		Usage: nslookup [HOST]
		</para>

		<para>
		Query the nameserver for the IP address of the given
		HOST.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ nslookup localhost
			Server:     default
			Address:    default

			Name:       debian
			Address:    127.0.0.1
		</screen>
		</para>
	</sect1>

	<sect1 id="ping">
	    <title>ping</title>

		<para>
		Usage: ping [OPTION]... HOST
		</para>

		<para>
		Send ICMP ECHO_REQUEST packets to HOST.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-c COUNT	Send only COUNT pings
			-s SIZE		Send SIZE data bytes in packets (default=56)
			-q		Quiet mode, only displays output at start and when finished
		</screen>
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ ping localhost
			PING slag (127.0.0.1): 56 data bytes
			64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms

			--- debian ping statistics ---
			1 packets transmitted, 1 packets received, 0% packet loss
			round-trip min/avg/max = 20.1/20.1/20.1 ms
		</screen>
		</para>
	</sect1>

	<sect1 id="poweroff">
	    <title>poweroff</title>

		<para>
		Usage: poweroff
		</para>

		<para>
		Shut down the system, and request that the kernel turn
		off power upon halting.
		</para>
	</sect1>

	<sect1 id="printf">
	    <title>printf</title>

		<para>
		Usage: printf FORMAT [ARGUMENT]...
		</para>

		<para>
		Format and print the given data in a manner similar to
		the C printf command.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ printf "Val=%d\n" 5
			Val=5
		</screen>
		</para>
	</sect1>

	<sect1 id="ps">
	    <title>ps</title>

		<para>
		Usage: ps
		</para>

		<para>
		Report process status.  This version of ps accepts no
		options.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
		</screen>
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ ps
			  PID  Uid      Gid State Command
			    1 root     root     S init
			    2 root     root     S [kflushd]
			    3 root     root     S [kupdate]
			    4 root     root     S [kpiod]
			    5 root     root     S [kswapd]
			  742 andersen andersen S [bash]
			  743 andersen andersen S -bash
			  745 root     root     S [getty]
			 2990 andersen andersen R ps
		</screen>
		</para>
	</sect1>

	<sect1 id="pwd">
	    <title>pwd</title>

		<para>
		Usage: pwd
		</para>

		<para>
		Print the full filename of the current working
		directory.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ pwd
			/root
		</screen>
		</para>
	</sect1>

	<sect1 id="rdate">
	    <title>rdate</title>

		<para>
		Usage: rdate [OPTION] HOST
		</para>

		<para>
		Get and possibly set the system date and time from a remote HOST.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-s      Set the system date and time (default).
			-p      Print the date and time.
		</screen>
		</para>
	</sect1>

	<sect1 id="reboot">
	    <title>reboot</title>

		<para>
		Usage: reboot
		</para>

		<para>
		Reboot the system.
		</para>
	</sect1>

	<sect1 id="renice">
	    <title>renice</title>

		<para>
		Usage: renice priority pid [pid ...]
		</para>

		<para>
		Changes priority of running processes. Allowed priorities range
		from 20 (the process runs only when nothing else is running) to 0
		(default priority) to -20 (almost nothing else ever gets to run).
		</para>
	</sect1>

	<sect1 id="reset">
	    <title>reset</title>

		<para>
		Usage: reset
		</para>

		<para>
		Resets the screen.
		</para>
	</sect1>

	<sect1 id="rm">
	    <title>rm</title>

		<para>
		Usage: rm [OPTION]... FILE...
		</para>

		<para>
		Remove (unlink) the FILE(s).  You may use '--' to
		indicate that all following arguments are non-options.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-i		Always prompt before removing each destinations
			-f		Remove existing destinations, never prompt
			-r or -R	Remove the contents of directories recursively
		</screen>
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ rm -rf /tmp/foo
		</screen>
		</para>
	</sect1>

	<sect1 id="rmdir">
	    <title>rmdir</title>

		<para>
		Usage: rmdir DIRECTORY...
		</para>

		<para>
		Remove DIRECTORY(s) if they are empty.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ rmdir /tmp/foo
		</screen>
		</para>
	</sect1>

	<sect1 id="rmmod">
	    <title>rmmod</title>

		<para>
		Usage: rmmod [OPTION]... [MODULE]...
		</para>

		<para>
		Unload MODULE(s) from the kernel.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-a	Try to remove all unused kernel modules
		</screen>
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ rmmod tulip
		</screen>
		</para>
	</sect1>

	<sect1 id="sed">
	    <title>sed</title>

		<para>
		Usage: sed [OPTION]... SCRIPT [FILE]...
		</para>

		<para>
		Allowed sed scripts come in the following form:
		</para>

		<para>
		<screen>
		ADDR [!] COMMAND
		</screen>
		</para>

		<para>
		ADDR can be:
		</para>

		<para>
		<screen>
			NUMBER    Match specified line number
			$         Match last line
			/REGEXP/  Match specified regexp
		</screen>
		</para>

		<para>
		! inverts the meaning of the match
		</para>

		<para>
		COMMAND can be:
		</para>

		<para>
		<screen>
			s/regexp/replacement/[igp]
				which attempt to match regexp against the pattern space
				and if successful replaces the matched portion with replacement.
			aTEXT
				which appends TEXT after the pattern space
		</screen>
		</para>

		<para>
		This version of sed matches full regular expressions.
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-e	Add the script to the commands to be executed
			-n	Suppress automatic printing of pattern space
		</screen>
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ echo "foo" | sed -e 's/f[a-zA-Z]o/bar/g'
			bar
		</screen>
		</para>
	</sect1>

	<sect1 id="setkeycodes">
	    <title>setkeycodes</title>

		<para>
		Usage: setkeycodes SCANCODE KEYCODE ...
		</para>

		<para>
		Set entries into the kernel's scancode-to-keycode map,
		allowing unusual keyboards to generate usable keycodes.
		</para>

		<para>
		SCANCODE may be either xx or e0xx (hexadecimal), and
		KEYCODE is given in decimal.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ setkeycodes e030 127
		</screen>
		</para>
	</sect1>


	<sect1 id="sh">
	    <title>sh</title>

		<para>
		Usage: sh
		</para>

		<para>
		lash -- the BusyBox LAme SHell (command interpreter)
		</para>

		<para>
		This command does not yet have proper documentation.  
		</para>

		<para>
		Use lash just as you would use any other shell. It
		properly handles pipes, redirects, job control, can be
		used as the shell for scripts (#!/bin/sh), and has a
		sufficient set of builtins to do what is needed. It does
		not (yet) support Bourne Shell syntax. If you need
		things like ``if-then-else'', ``while'', and such, use
		ash or bash. If you just need a very simple and
		extremely small shell, this will do the job.
		</para>
	</sect1>

	<sect1 id="sleep">
	    <title>sleep</title>

		<para>
		Usage: sleep N
		</para>

		<para>
		Pause for N seconds.
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ sleep 2
			[2 second delay results]
		</screen>
		</para>
	</sect1>

	<sect1 id="sort">
	    <title>sort</title>

		<para>
		Usage: sort [OPTION]... [FILE]...
		</para>

		<para>
		Sort lines of text in FILE(s).
		</para>

		<para>
		Options:
		</para>

		<para>
		<screen>
			-n	Compare numerically
			-r	Reverse after sorting
		</screen>
		</para>

		<para>
		Example:
		</para>

		<para>
		<screen>
			$ echo -e "e\nf\nb\nd\nc\na" | sort
			a
			b
			c
			d
			e
			f
		</screen>
		</para>
	</sect1>